PLZ HELP ASAP A specific location in America produces electricity from fossil fuels and geothermal energy. The table below shows the amount of nitrogen oxide in the atmosphere of the location from 1960 to 2000.

Year 1960 1970 1980 1990 2000
Nitrogen oxide concentration (in parts per million by volume) 285 258 234 199 117

Based on the table, which of these conclusions is most likely correct?

Geothermal energy was replaced by fossil fuels in 2000.
Fossil fuels were replaced by geothermal energy in 2000.
The least amount of fossil fuel was used between 1980 and 1990.
The greatest amount of fossil fuel was used between 1960 and 1970.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.