The world’s climate players are starting to bring their contributions to the table (Image: Corbis)

IT’S like a giant game of Jenga. One by one, pieces of our green future are stacking up, some more precariously than others.

At last week’s summit in L’Aquila, Italy, leaders of the G8 declared formally for the first time that the world should not allow global temperatures to rise by more than 2 °C above pre-industrial levels. The group also backed Mexico’s plan for a green fund to help the poorest countries develop clean-technology economies.

Meanwhile, in London this week, the shipping industry is …