Human-created climate change is caused by (1 point) O increased use of green energy sources.
O increased oxygen in the air.
O increased carbon dioxide in the air.
O decreased burning of fossil fuels.

There are four nitrogenous bases that make up dna. the two pyramidines are thymine and cytosine. the two purines are adenine and guanine. these bases pair in a very specific way. adenine - thymineguanine - cytosine i remember it like this: a tall, good cat.

Even heating of the earth at all places