既然清洁能源比起化石能源来得环保许多，那么100%的新能源化能够实现么？
How to create cleaner coal - Emma Bryce
Renewable Energy Explained in 2 1-2 Minutes
Renewable Energy and the Energy Transition
The carbon cycle - Nathaniel Manning
Phenology and nature's shifting rhythms - Regina Brinker
Climate change Earth's giant game of Tetris - Joss Fong