TED】ティム・クルーガー空気中のCO2を取り除くことで気候変動を止めることはできるのか？(Can we stop climate change by removing CO2 from the air? | Tim Kruger) (【TED】Tim Kruger: Can we stop climate change by removing CO2 from the air? (Can we stop climate change by removing CO2 from the air?