media because the internet isn't emission free for example a search query on google causes about northpoint 2 grams of c o 2 and email about one gram of c o 2 and i was video streaming or downloading pollutes the environment with 200 grams of c o 2 now that doesn't sound like a lot at 1st but it really adds up through worldwide mass use. the cloud has become so important that it's hard to imagine daily life without it. nearly every e-mail every whatsapp message every internet radio reaches us through the cloud and this cloud needs electricity a lot of it and that in turn produces a lot of c o 2 emissions even more than the air transport industry does a scientific study shows the total sum is almost 4 percent of all worldwide c o 2 emissions if the internet is generally climate neutral because we don't need a car to drive it why is the cloud expanding. some of her addict saying that in 10 years will need 3 or 4 times as much energy is now but there are also less extreme predictions they say our energy consumption will only double but overall you can say that internet energy consumption is co

we spoke to a war correspondent, michael, who was mentioning in one part of the city, northpoint, a residentialheir windows, shouting out, free hong kong, liberate us. that really is and incation of sentiment. deirdre: gordon, when china says it can declare a state of emergency, residents in hong kong, they do have the right to assemble. i know this weekend protesters intimated there was kind of a religious element to get around the authorization not to protest but what's the worst-case scenario when china says we have the right to enforce a state of emergency? >> the worst-case scenario is that they formally deploy the peoples armed police or peoples liberation army on the streets of hong kong. most people believe there are chinese troops or chinese policemen who are wearing the uniforms of the hong kong police. then so, bejing is already here. they have taken over the hong kong government. carrie lam, chief political officer is no longer making decisions and there is a feeling that the hong kong police, especially with their much more aggressive attitude, it is a result that china is controll

at least three set way stations -- subway stations, northpoint, liking and callow and calhoun tongue protesters are calling kowloon tong.s -- anyone getting to the airport had to find their own way and not to silly for five or six hours per they cannot take the airport express. or six hours protester disrupted the tracks. they also destroyed a number of station turnstiles. causing civic and civil disruption. paul: of course hong kong historically no stranger to unrest when it comes to defending it independence and palooka freedoms. this time -- and political freedoms. different.oes look shots fired as you described. and water cannons on the street. how long does this go on? we see response from china? >> that is the million-dollar question paid we do not know how long this is going to go on. the protesters are saying they have turned to certain levels of violence because the local government has not conceded on any of their main five demands. the government saying that they are not going to at least have serious dialogue until the violence stops. so we are in an impasse right now. ar