Festive Earth Society - Direct Buy Mountain View

The value of agricultural production represents less than 2% of U.S. gross domestic product, but agricultural products constitute about 5% of the value of U.S. exports. Climate change is likely to produce impacts on the entire agricultural, plant growth under the conditions of competition on international markets.

The effects on the whole quite positive, vary depending on the type of culture and the region considered, some yields rise as a result of additional CO2 and water, while others reduced yields because of temperatures too high. This report has not yet been updated but the search continues in particular within the Agricultural Research Service of the Department of Agriculture.

International Polar Year, the Science Centre Hotel (2, rue de la Commune) will host a major symposium entitled "The USA, climate change and the Regain American interest in a changing region. " A title that can be frightening at first, but dwell a global issue and worrying

"The interest was to involve the USA, the Arctic and climate change. We talk more since the Cold War, "said Joel Plouffe, a researcher and coordinator of the observatory on the USA for the Chair Raoul Dandurand in strategic studies and diplomacy, which orchestrates the event for months.

For the young student researcher at UQÀM, the symposium beautiful join experts from the fields of international politics, the environment or geography, the subject and interventions are no less interesting for the general public.

"What happens in the north is a reflection of what will happen in the south, the decisions that are taken in Ottawa, Washington and Moscow will have any impact on the planet. Also, it is a responsibility that what is happening there. It takes longer protect people who will suffer the decisions of countries and understand the consequences of climate change on the environment, "he says.

Hitchins is a professor emeritus of international relations at the University of Alaska Anchorage. In his presentation on April 19, the British show how his state of adoption, Alaska, has not escaped the effects of melting the ice cap and how the USA are slow to recognize the very existence of changes climate.

"The people and especially the Inuit in northern Alaska are faced with the melting of ice, coastal erosion, and there are even population movements. […] I am optimistic. There are people, the Congress or the Senate, which are for the protection of the environment in Alaska, one of the few remaining places where nature is still predominant. "The professor also believes there who recognize the value human beings more than that of businesses and oil interests, even if it is well recently.

The fact that man is changing the composition of atmospheric carbon dioxide through the use of coal. From a relatively simple calculation, he believes that our planet will warm by 5 degrees by the end of the 20th century ... But it was not until 1970's that the problem of the action potential of human activities on climate becomes an object of attention of scientists.

The modelers take first conscience. The years after the Second World War saw the onset of computers, so far rudimentary. The weather forecasting is one of the areas explored from models based on a system of physical equations for describing the movement of the atmosphere and the cycle of water evaporation from the ocean surface until 'The formation of precipitation.

But climatologists are very quickly the ability of these models to account for different climates from that in which we live today. The experiments conducted during the 1970 review the case of doubling the carbon dioxide content. They confirm that such a change would result in significant warming. These results are taken seriously and motivate scientific meetings and expert reports including one published in 1979 at the initiative of NSF (National Science Foundation in the USA) the conclusions already well documented.