The more co2 we release the acidic the ocean becomes through a process called ocean acidification where ocean water becomes carbonic acid.This happen because as we create more factories and drive more cars the more we release co2 and the ocean absorbs about 25% of carbon
The annual extinction rate is 100 species for every one million and can be up to 10,000 species in the future.This is happening because humans are growing in population and we need to feed them but by making farmland we cut down