As the world focuses its attention on climate, we’re looking to the money that could create real change. Venture capital is the type of financing that can take new ideas to the mass market and it’s finally looking to fund clean, green tech. First, to understand how start-ups go about seeking VC funding, Vivienne Nunis hears from founder Diedre McGettrick. Gabriel Kra, of the venture capital firm Prelude Ventures, explains the shift he's seen in low-carbon investing. But Silicon Valley attracts the world’s sharpest minds, so why aren’t more tech leaders coming up with the bright ideas needed to fight climate change? We ask founder-turned-investor, Ben Parr. Producer: Sarah Treanor. Image: Smart farming technology. Credit: Getty Images

Correction: Prelude Ventures invested approx. $125m in the past 12 months, in deals totalling $1.3bn. It didn’t invest $1.3bn on its own, as was stated in the programme.