Less expensive source of energy is available.
hope this helped, please mark brainliest :)
Blood enters the pulmonary vein with close to 100% of the blinding site for oxygen saturated.
Answer:
Humans burn fossil fuels, clear trees, change land use, creating smog that traps the carbon in the Earth's atmosphere, leading the oceans to absorb the heat and eventually end up with global warming and ocean acidification.
Explanation:
Good luck <3
Hadean is the first eon of precambrian, and took place around 4.6 and 4.0 billion years ago.