Why does tempreture increase when the amount of carbon dioxide or methane in the earth system increase?

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Several billion years ago which gas was the least prevailant in the atmosphere

In what cells is the human genome located?