The main sources are humans which is why it is stated that the global warming is man made. The levels have increased beyond all measure, increasing since the 1950s by a 100 CO2 parts per million, and it keeps increasing by 2ppm on a yearly basis. The statistics from the industrial revolution era are not much different and show how much we've increased the CO2 in modern times.
Answer:
Physical, Human and Environmental
Explanation:
Mount Everest is the tallest at approximately 29,032 ft high
Answer:
The lake will gain nutrients. As such it will undergo eutrophication
