has global warming happened before? is it just a cycle of the earth?

Question

there is evidence that romans used to grow wine grapes in southern britain, and in some places around the coast that used to be accesible by boat that are now miles inland. maybe this is supposed to happen every so many years?

Answer 1

It has happened before. In the time of the dinosaurs there was no permanent polar ice cap and sea level was several hundred feet higher than it is today. Nobody really knows the cause, but we can be sure it wasn't people burning coal and oil, because there were no people then.

But do not use that as an excuse to ignore the present problems of increasing CO2 in the air and running out of oil.

Answer 2

sure. I sorry to declare you're incorrect. for the time of the Nineties there wasn't adequate information to declare no count if it grow to be human activity or organic cycle that grow to be inflicting international warming. in actuality you'll be able to (or won't, counting on age) bear in mind that interior the Seventies the perceived hazard from nature grow to be no longer international warming however the onset of the subsequent Ice Age! although, because of the fact the 90s the laptop fashions have been sophisticated as extra information has grow to be obtainable. most of the maximum recent systems run hundreds upon hundreds of eventualities, with the outcomes being clustered. all of them come to the top that it particularly is human activity in inflicting the great launch of carbon into the ambience that has led to the warming that has been monitored promptly because of the fact the Nineteen Fifties, and can be traced back via study of ice cores, tree-jewelry etc, to the 1700s and the commencing up of the commercial revolution. in easy terms the likes of President Bush stand interior the face of the technology now. Ten years in the past your view element could have been valid. now no longer.

Answer 3

Even with the Consensus finding it "inconvenient truth" about the MWP (and the LIA) and that if they add that data to their computers unaltered, they do not come out with reasonable figures (to them anyhow), History records warm periods as warm or warmer than projected.

Just read of about 10,000 years ago evidence of growing squashes and cotton in the medium high Andes mountains.

Those are warm weather long-season plants, at least what I have played with.

The accepted graphs going back 500,000 years show warming to higher peaks than now in the Global Warmings every 90,000 years or so, based on ice core samples. Of course, if the CO2 found is plotted along with the temperatures, it generally peaks about 800 years LATER than the heat!

So it is shown that this is a natural cycle, and is not due to man-made CO2 at all.

In fact, probably is not from CO2 increase from any source at all. CO2 increase shows it happened in the past before the CO2 peak!.

So another "inconvenient truth" off their own charts!!

Yes, been a cycle ever since something, perhaps an asteroid impact, changed the Earth's poles from out in the warm oceans with gentle currents, to being landlocked in the arctic and antarctic.

Can we have the astronomers, or better yet, the Consensus, direct another asteroid over here quick, and knock the earth back where it "should" be!! A glancing blow in Siberia, perhaps? Or wouldn't it be poetic justice if the proper aiming point was on top of "Carbon Credits" Gore's house?

Answer 4

The number of ignorant answers is astonishing. Where do these people get their opinions?

The current climate change is all well understood. Of course there have been climate changes in the past, driven by various factors: change of the Earth's orbit, changes of the Sun, natural emission and absorption of greenhouse gases. The changes in the past century are, however, *MANY TIMES FASTER* than has ever been seen before, and the only possible cause is anthropogenic greenhouse gasses. There is essentially no doubt about this, if you take the time to understand the science and the observations. The conclusion that future warming will reach dangerous levels if we persist in burning fossil fuels is a simple extrapolation of the current situation. Wake up before the Earth is destroyed, people!

Answer 5

Yes global warming happened may times before due to natural phenomena, BUT there is more than enough scientific evidence to prove that the current global warming and mass extinction is MAN MADE. Read the www.nature.com or Scientific American website or magazines. Those are real respected scientific journals. Don't believe any other non scientific info.

Answer 6

campelp2002 makes a good point, but CO2 emissions are the tiniest of factors. We could go to zero CO2 emissions, ban fire even, and the warming would continue. The warming is 99.99% natural.

Yes, it has happened that the climate has changed in the past and that sea levels have changed, entirely naturally. They will do so again, entirely naturally.

Answer 7

It certainly has, but we're changing the climate at such a fast rate and there are many more people living on the planet in areas where they are more likely to suffer.

But it's not the only environmental problem - there's also pollution and habitat loss all over the world. Cutting carbon dioxide is just one of the things we need to do. The way forward is a "cradle to the grave" strategy of production, where the impact on the environment is considered at every stage. For some reason people don't like these ideas, but it's not about wearing mocassins and eating tofu, it's about technology. And that means more jobs and more money and more freedom to enjoy what's left of our beautiful planet. We can do it.

Answer 8

There have of course been periods before when the earth warmed up and I for one tend to believe that is happening now, however like most people i just don't have sufficient knowledge to be sure if we should try not to make it worse

Answer 9

yer it has happened before its something to do with all the snow in the ice age reflects the sun and then it melts so the sun isnt reflecting anymore and then the ice comes back :$ err i cant really remember but the important bit is that every time the earth pulls out of the heat or ice in time and starts the new cycle

if we make global warming any worse with CO2 etc then it could not

aaahh!

Answer 10

Yes, it is a normal cycle of the earth. During the carboniferous period temperatures were a lot higher than they are now. A much higher level of carbon dioxide was in the atmosphere. There were giant insects and tree ferns, swamps and coal seams were laid down thus removing carbon from the environment.

All we're doing now is restoring the status quo back to what it was millions of years ago, by burning the coal and oil and releasing it back into the environment.