Generate text that refutes this claim: Consequences of increased GHGs  Increased GHGs in the atmosphere have numerous significant consequences:  -glaciers, ice sheets, and perma frost will continue to melt. This will increase water levels, release more GHGs (methane, which is twenty times more powerful as a greenhouse gas than CO2 and CO2), and reflect less heat back into the atmosphere exacerbating climate change1.  -the oceans (which are a natural carbon sink) are becoming increasingly acidic which will significantly damage ecosystems such as coral reefs. Additionally, changes in the chemistry of the ocean could affect the amount of CO2 it can absorb and process annually.  -there will be increasing incidents of extreme weather such as hurricanes, floods, and record high/low temperatures. Extreme weather can destroy ecosystems that capture CO2 such as forests and peat bogs leading to less natural CO2 absorption.  These events will accelerate climate change making it more difficult for humans to reduce GHG ppms to a sustainable level. Once average temperatures are above 2.5C, events will be triggered that will be irreversible and it will take 1000s of years of lower GHG emissions for the earth to return to normal 2.  1. Connor, Steve, 'Exclusive: The methane time bomb', The Independent, 23rd September 2008,  2. Wikipedia, "Climate Change Feedback". Retrieved 2011-08-08.
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These consequences are often speculation. With such a large and complex system we have no way of knowing what the consequences of climate change. There may well be some tipping points that will accelerate climate change but we do not know when each of these will become a problem and there may also be tipping points that act in the other direction.(See Earth's Resiliency)