narratoror: accordining to a 207 unitited nations report, o overa million people dieie prematurely in india each year b because of toxic particles in the air, a 50% increase since 1995. jyotsna pandit is a 17-year-old stududent at delhi's prestigious sanskrkriti schoolol. pandit: so finally, we went to the doctor, and he told us that i have this condition. it's an allergy whicich is aggraravatedy dust and other particulate pollutants in the air. narrator: last november as pollution levels spiked to their highest in 17 years, the gogovernment shut down schools across the city. pandndit: there was ththis peri, this 1 10--10-day y period in november 2016 when t there was a great smog that cocovered entire delhi, and the pollulutant leves were so o high that t they justt off chararts. i thouought thatie i have a firsthand experience of what children go through when they're sububjected t to pollutd air, to dust pararticles, partrticulate matter, why dodo'i take an initiative do to something for the environment? narrator: concerned that adults were not doing enough, jyotsna, along with two

accordining to the u united nats environmental progogram, buildings s use about t 40% of globobal energy.y. anantonio guterres: the moral imperative for action is cleara. all of us--governments, businesses, consumers--will have to make changes. more than that, we will have to be the change. narrator: but how does t this trtranslate into real lilife? in seattle, washington, the ritchie family has built a passive e house for themselves using advanced technology to drastically cut their energy use. ritchie: it blocks the sun... i am an environmentalist. i was an engineer for about 10 years. i have been now in construction for about 10 or 11 years. i like to work with m my hands, and i like--i like construction a lot and wanted to take it to sort of another level toto really dodo something meaningful in the community. once you build a house, hopefully, it's gonna last for a very long time, and you kind of have one opportunity to really fix the energy consumption of the house, and you lock in that energy consumption for a hundred years, and so, for me, that was a very compelling idea, so we dec