pThe private sector is increasingly entering the humanitarian field, flipping the conventional model on how to make a buck.pbr French giant Danone, one of the world's biggest food manufacturers, is promoting sustainable agriculture. It's teamed up with other multinationals by starting the Livelihood investment fund. The fund has three admirable goals: increase farmers' incomes, improve their families' quality of life, and promote environmentally friendly practices.br But it's not just big multi-nationals who are trying to change the world. People all over are teaming up. The NGO Ashoka claims to be the largest worldwide network of so-called social entrepreneurs, pairing the business skillset with a social outlook. There are no easy solutions when it comes to saving the world, and there are no cheap ones either.