a climate change tree a city tree of the future. we still have to see how they fare in urban settings my suspicion is they're far superior to native species. climate change is playing havoc with cities around the world. one reason many cities can't deal well with heavy rain or floods is that so much city surface is covered by concrete and water can't see into the ground. environmental scientists complained that this ceiling effect means half of all rainfall is lost compared to woodlands and meadows and not available to people all nature. rain water that channeled straight into drains and carried away is gone it can evaporate and it's removed from the natural water cycle effect of evaporation cools the air and we feel that to start for so you can all the sealed surfaces heat up a lot and stay hot if there's no cooling effect from evaporation that's one reason

we get urban heat islands and alternative approach can be found in southern belle them in a neighborhood where sponge city water management principles have been adopted here rainwater is collected on open ground and roofs and channeled into the local pools it doesn't just disappear down the drain and it was to weigh on a clue that is a hydrologist who works for villains only miscible water company think tank. as being rain water is a very valuable resource we need it to adapt our city to a changing climate that's why our goal is to manage and use it locally. for the entire project takes up 10 hecht is it's full of unpaved surfaces strips of garden and the roofs here also covered in soil and plants lots of opportunities for rainwater to be soaked up and slowly released into the ground imo if it's come off the rain or to see into the ground between the paving. it flows into little

depressions in the ground like this one. that's why there's a gap in the curb. i mean and that water sinks in order to evaporate dust benefiting the trees. that had from him haven't set up his climate cops 5 years ago his heat resistant trees can't do entirely without water but it will take time to find out just how much water they need and how well they adapt. using guns on farms. yes it's still in the early stages. we're testing $61.00 species of tree seeing how they fare. we've been growing some of the species for decades so we already know their strengths and weaknesses and sharpton is up on a business where he has so far raised 10000 trees new to germany's urban landscapes but better able to weather climate change trees like the turkey oak and you climb

a tree which is being introduced more frequently into hamburg's neighborhoods all of which should make for some pretty cool cities. all huge charland great urban isolation with a growing amount of garbage here in lagos the producer the estimated 10 paltry transfer of trash every day and only a small amount of bad to dispose off the spigot. things can get pretty as many in the city and more than that disease can spread and a water supplies become quantum needed a huge problem sometimes requires a huge investment if you appeal spent in minutes setting up a new polling station and the other one to get using the plant supplies a quarter of the city's households with electricity sounds like 2 problems solved at once. this incineration plant called repeat is the

1st of its kind in africa it produces electricity for his capital city. every day at around 2000 tons of garbage delivered here 2 thirds of that is burned . first the waste is stored at the bunker for 5 days to release moisture then it is burned at a temperature between $8850.00 degrees celsius. khamis same to you who has been working here since the opening of the plant. the trash can. and better innit. after that he threw be hit so what that so i thought will create a stamp that is the. 3rd that i want to cut away generated electricity.

the filters of the incinerators are made to be your standards so that is little pollution is possible leaks into the air. that makes it more eco friendly then open burning off waste on landfills which is still common in african countries the plant was built on parts of the former question dumpsite at the outskirts of the city. that director elam a year who says that cautious served for about 50 years to discard the waste of this. his administration has transformed the dump site into a manageable landfill if this keeps away fires in better order through waste treatment and guess venting there are a number of course this is never acceptable this was to analogy because they are not a valid source out of this was this which cannot be baronets and which can this facility will be disposed of on the land. the repeat incineration plant was

constructed and funded by an international consortium and the ethiopian government it provides electricity to around 25 percent of households in a disservice. that is its low capacity 25 may go but it is contributing for. cleaning the city it is contributing for. energy to the system so it will serve us a model for other cities to. cleaning the city. of course call fired power plants or gas facilities are more efficient in making electricity and then this. incineration plant. but this waste to energy system is not only generating electricity it is also saving land space preventing the release of toxic chemicals into groundwater and reducing the release of methane into the atmosphere was

getting your aunt in metal cities is often a grueling business and can take hours there is so long in tanzania has been growing fast bowling steadily out want to call them or anyone it is now home to over 5000000 people profit is a nightmare on the air right now the city is starting to talk of the problem by developing a walking transit and boston it was more than 100 kilometers of new pastorate are planned for coming here. there was a time when it will take up to 2 hours for it to get from his house to walk in the morning although he lives within the city limits of darussalam he was dependent on mini buses that are the most common means of transport here. they're usually jam packed before you even get to and everyone is freezing together the

other problem is that they are so many traffic jams and you spend a lot of time just sitting and waiting to move it's also exhausting a couple problems with more than 6000000 inhabitants that he says is well known on its way to becoming the next to mega city in africa in the next couple of years the book nation is expected to belong to 10000000. look atari heads one of the agencies done with that up thing and improving infrastructure. people were experiencing you know when just. their infrastructure. some of it was not very good so many hours were ghost. being on the road going to work in the morning sun in the evenings when people went back home. one solution about space rapid transit system with bigoted bus lanes that bypassed much of the traffic across the city this is themself. 21 kilometers and has already cut travel time for some

residents in half. when we consider their options the bus systems appear to be easier to implement in your city because of. the cool train system and we looked up inclusive it was when you. bring in a bus system most of the people working in school be absorbed. into the new system that turns on n.p.r. object was supported by the institute for transport and development policy. before the b r t came into. public transport services provided by heavily polluting mini buses and appear to be was able to replace 3000 vehicles with 140 high capacity busses meet a much better emission standard for their new bus system has been a blessing for each and he is just one of the many thousands of passengers will cut

their commute by 50 i was a month. right. before i felt bad because i was always getting home so that the kids will be asleep by the time i advised but it's so much better now i get to spend time with my kids. play with them because they're up it gets me home so much. i don't want to. once the project is completed in 2000 the time and it will cost $6.00 nines will cover $100.00 venkat acumen times until then so no need and i visit it's all darussalam we have to rely on been again i was quite pleased some of the journeys. that fit in this is a special edition of alba night vision thank you all for joining us well if you are currently doing something to protect the environment would like to hear from me so please do get in touch with us on all social media platforms i am sundra to nobody

else lining up in kampala uganda. banks on drugs do join us again for another edition of i could offer a metric from a crystal lens it's going to buy from lagos nigeria take care o. say you like straight.

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crime fighters are back again africa's most successful radio drama series continues this season the stories focus on hate speech prevention and sustainable production . all of a sow's are available online and of course you can share and discuss on africa's facebook page and other social media platforms. crime fighters tune in now. this is day w news and they is around top stories. one of 3 minute cues do of murdering multis journalist definitely karo on it deletes has been sentenced to 15 years in jail it came off to he unexpectedly changed his plea to guilty caroline ability i had been exposing corruption.