Europe imports half its energy, predominantly fossil fuels - and Russia is the EU's top supplier for both oil and gas, with European countries paying more than £200 per person to Russian oil and gas giants last year, Oxfam said.
The over-reliance on fossil fuels worsens climate change which in turn threatens agricultural production and pushes up food prices, the charity warned. The world's poorest people are already suffering greater hunger as a result of climate change, it said
Martin Dawes, Regional Spokesperson UNICEF West and central Africa said: "There is still time to avert a catastrophe amongst children inthe Sahel region of West Africa.
"1.1 million children over the course of this year will need life saving intervention because of severe acute malnutrition. This is a crisis with multiple causes where adults will suffer but children will die.
"5,200 nutrition treatment centres have been set up in nine countries but the next two month will be extremely hard for children and their mothers. Most at risk are those who become malnourished and fall prey to conditions such as malaria and diarrhoea."
ITV News has visited a hospital in southern Niger to give an eye-witness account of the food crisis developing there. Africa Correspondent Rohit Kachroo shows in his report how a once-in-a-generation hunger crisis strikes the children of Africa.
Britain is now helping a total of more than 1.6 million people at risk of hunger across the Sahel, the Department for International Development said.
Britain announced £10 million of funding earlier this year to support over 400,000 people across the Sahel region.
International Development Secretary Andrew Mitchell announced in June that Britain will give £10 million additional funding to UN and NGO agencies to provide food, healthcare, water, sanitation facilities, seeds, tools and livestock support for up to 1,027,000 people.
Britain has now announced it will provide a further £5.4 million of funding to the UN and NGOs.
He also talked about the concept of "food security" which is something the Obama government are set to make a number of pledges on during the G8 meeting next week. Food security is a term used to describe both the availability and access to food for the world's poorest.
Food security across the continent of Africa is being threatened by the continuing rise of food prices.