Which of the following is true about the key points agreed at the recently held Earth Summit, 2002 in Johannesburg?
I. To halve proportion of people wilhout access to proper sanitation by 2015.
II. To cut significantly the rate at which rare animals and plants are becoming extinct by 2010.
III. To initiate strategies to preserve resourcesfor future generations by 2005.
IV. To increase the share of world energy produced from renewable ‘green’ sources such as solar or wind power.