If everyone lived like an average North American we would need 5 planets. If everyone lived like an average European we would need 3 planets. If everyone lived like an average Emirati we would need 10 planets.
Our global footprint grew by 60%between 1961 and 2003. It is now 20% above the planets biological capacity to support life on earth.

The WWF has developed an initiative called one planet living. It has 10 guiding principles.
1- Zero Carbon: because of the human and his activity the atmosphere contain a lot of CO2
2- Zero Waste: When human waste a lot of products this may cause a huge problem like waste for wastes valuable resources.
3- Sustainable Transport: When the people travel by cars or plane he made an air and noise pollution
4- Local and Sustainable Materials: From using Destructive resources we damage a lot the environment.
5- Local and Sustainable Food: the food we get it from the agriculture and had bad quality may cause lot problems and harms local ecosystems.
6- Sustainable Water: Because of increasing of population the demand of fresh water were increased but the there are not enough freshwater.
7- Natural Habitats and Wildlife: Using a lot of biodiversity cause a lack of natural recourse.
8- Culture and heritage: As a result of globalization, local culture and heritage is being lost.
9- Equity and Fair-trade: A lot of people live under the line of poverty and they can’t have their basic needs.
10- Health and Happiness: A lot of people think they live in healthy and life full of happiness
I think the first one is the most difficult one because I think it hard to have a city that contains 0 CO2.
The three goals of the One Planet living programme here are:
1- Zero Carbon
2- Health and Happiness
3- Culture and Heritage