Four questions for Al Gore.

Looking at the Vostoc CO2 and Temp. graph I see that the temp. rises about 400 years after the CO2 level rises.

1) What started the CO2 rise in 1850?

2) What is the rise in temperature since 1850 till now?

3) The graph shows that the temperature rises 400 years after the CO2 levels go up so does this mean that we have till 2250 to tackle this problem?

4) A Channel4 documentary said that the CO2 went up after a temperature rise. Is this a straight lie?