I will just throw in my opinion-
Global warming is a natural process, sure, however, since the industrial revolution carbon dioxide levels in the atmosphere have risen significantly more than it naturally would have done, therefore we are speeding up the process.
How much is debatable.
However, a larger concern is the lack of resources and the price of energy. The more we burn, the less we have. By the end of the century we are going to be out of oil and gas, and low on nuclear reserves. Rare earths will also be far more expensive.
Therefore, I believe we should try and be more efficient and 'sustainable', so the future generations can have the privileges we have. To me, being more efficient does not involve buying bull**** energy 'efficient' florescent lightbulbs, or drive around in lithium packed electric cars. Nor should we put photovoltaics on our roofs, which are full of more rare earths, and have unsustainable government subsidies.
Instead, we should limit our journeys, and keep the old cars running instea of scrapping them for a £2000 government grant. We should try to increase the efficiency of the internal combustion engine whilst looking for alternative sources of energy, such as nuclear fusion (not for a car!)
Also, electric cookers and heating is the least efficient method possible. When installing heating, more people should install fuel burners because electricity is under 30% efficient by the time it gets to your home. Burning fuels in situ is arguably 100% efficient because the main source of wasted energy is heat.
We can also grow plants as mentioned above, as this is the most effective eay of increasing O2 levels.
Also, there has been evidence found in Mexico that the dinosaurs died out due to a meteorite impact 65MA. Iridium, shocks quartz and dust is found in the KT boundary.
Just remember, there's no such thing as a free lunch.
JMO