About the First Earth Day in 1970

How much has the global population increased between 1970 and 2020?

• It has decreased.

• It has remained the same.

• It has more than doubled.

• It has increased by less than 50%.

What is the percentage increase in per capita plastic production between 1970 and 2020?

• 21%

• 65%

• 447%

• 561%

By what percentage has ocean acidity increased per decade?

• 1%

• 2%

• 3%

• 4%

Are you enjoying the video lesson?

• Yes

• No

By what factor has wind power capacity increased between 1970 and 2018?

• 32x

• 400x

• 5x

• 10x