Material Detail

'Throughout its long history, Earth has warmed and cooled time and again. Climate has changed when the planet received more or less sunlight due to subtle shifts in its orbit, as the atmosphere or surface changed, or when the Sun’s energy varied. But in the past century, another force has started to influence Earth’s climate: humanity.'

This site explains global warming and has links to other resources....

Disciplines:

• Education  / TeacherEd  / Teaching Methods  / Science

More...