Why is this President in Copenhagen?

I can't see where this president has Constitutional authority to do the things he is attempting to do in the Global Warming summit aka climate change summit in Copenhagen.
First let me say that this global warming,climate change, man made climate change or whatever else you want to call it is a hoax. It is about changing our form of government from a Republic to a socialist, marxist and even Nazi form.

Let me stop here and give you definitions.
1)Socialism:
a theory or system of social organization that advocates the vesting of the ownership and control of the means of production and distribution, of capital, land, etc., in the community as a whole.Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.

2)Marxism
n. The political and economic philosophy of Karl Marx and Friedrich Engels in which the concept of class struggle plays a central role in understanding society's allegedly inevitable development from bourgeois oppression under capitalism to a socialist and ultimately classless society.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.All rights reserved

3)Republic:
1.a state in which the supreme power rests in the body of citizens entitled to vote and is exercised by representatives chosen directly or indirectly by them.
2.a state in which the head of government is not a monarch or other hereditary head of state
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.

Text from the Declaration of Independence
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, — That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness. Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes;

As you can see we do not recognize monarchs and therefore this president does not have the constitutional authority to sign away our sovereignty to anyone. Not the globalist. Not the United Nations, Not the North American Free Trade organization. TO NONE!

Fear-mongering is the means that liberals,socialist,and nazis use to get the people to give up their liberty in the name of security. We must educate our friends and families. Our neighbors and co-workers. If we do not reign in this president and the socialist congress and senate we will cease to exist as a free people. The burden is growing every day on the backs of good law abiding hard working citizens.

We must force ourselves to see that the goal of Washington is to bring the people under their control, that this oppression is only going to get worse, and that we must realize that our succeeding generations are going to willingly live under tyranny because they will not know anything else. Because we were unresponsive and mute they will think that it is just the way it is. WE MUST NOT LET THIS CONTINUE!
God Bless America!
David