The statement is true I learned that in pre schoollol
I can't see the problem for number 18 write it out and I can help you!
Answer: very small amounts are easier to express as ppm.
Explanation: 1 ppm = 0.0001 %
Greenhouse gases warm the air near Earth’s surface by absorbing heat emoted by Earth.
This is a an example of the food chain. The zebra is a Herbivore and eats grass and the Lion is a carnivore who eats meat aka as the poor zebra D;
