I'm raising vital funds for grassroots projects in Central and South America as part of the Global Giving UK Project Evaluation programme. This summer I'll be visiting local NGOs in Mexico, Guatemala, Haiti and Peru to assess their work and help them with their strategies. But I need your help. The programme, which sends out trained volunteers every year, needs support, as do the projects I visit. None of the money raised will go on personal expenses, as I will cover these myself.