"We are using 50 percent more resources than the Earth can provide. The global average is 2.7 hectares per person, while the Earth can only cope with 1.8 hectares. Belgium has a very poor score with 7.1 hectares. In fact, we behave as if we have an extra planet at our disposal somewhere", explains Damien Vincent of WWF Belgium.

"Unless we change our course drastically, our footprint will continue to grow, in a way that we would need at least two extra planets by 2030."

The WWF report indicates that our enormous footprint is mainly due to rising consumption trends. Worldwide, it's mainly the growing population that's becoming a real problem. "The global population has more than doubled since 1950 - to 7 billion in 2011 - and is forecast to reach just over 9.3 billion people by 2050", the report points out.

These factors, combined with a steady rise of energy consumption in rich countries and BRIICS countries brings the WWF to the conclusion that our footprint will continue to rise.