Following multiple terror attacks that struck Paris two weeks ago, world leaders flying into the city with heightened security amid an atmosphere of unprecedented positivity that a much needed climate change can be reached.

The leaders are meeting in Paris for the start of a United Nations change conference with the objective of securing a long term global agreement on limiting greenhouse gas emissions.

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According to Itv, COP21, the 2015 Paris Climate Change Conference, will kick off on Monday amid tight security due to the recent French capital terror attacks.

COP21 is aimed at finding a way to minimize the global emissions of greenhouse gases. Emissions such as methane and carbon dioxide are to be reduced over the coming decades to prevent the world's average temperature from increasing by more than 2C by the end of this century.

There have been several demonstrations in the city ahead of the meeting. Protesters recently covered the city's Place de la Republique with shoes.

Demonstrations have also been taking place in other countries, including London. There, celebrities such as Dame Vivienne Westwood and Charlotte Church joined the demonstrators on the streets.

The Prime Minister of Australian Malcolm Turnbull flew in to Paris from Malta, where he urged Commonwealth leaders to send a strong signal of the significance of a deal in Paris.

Before leaving for the Commonwealth Heads of Government meeting, Mr Turnbull took a swipe at Bill Shorten the Opposition Leader for making a heroic pledge to make a much deeper cut in greenhouse gas emissions than the government plans, Sidney morning reported.

President Francois Hollande of French will usher in the world leaders among them US President Barack Obama, David Cameron, German Chancellor Angela Merkel Chinese President Xi Jinping and Indian Prime Minister Narenda Modi.

The Prince of Wales has confirmed accepting an invitation from President Hollande and is set to deliver a keynote speech on the opening day of the summit.

TagsParis, Paris Attacks, ISIS, ISIL, Paris Climate Change Conferenc, COP21, Malcolm Turnbull, Barack Obama, world leaders, Paris Climate Change Summit Protests, paris climate change summit