WWF-UK's research shows the dates that the residents of every British city will have consumed their fair share of the earth's resources for the entire year and will go into ecological debt.

Our over-consumption of resources is driving rapid changes in our world including degrading forests and animal extinctions. Almost every indicator of the health of our planet's natural systems shows that they are no longer able to adjust to the consequences of human activities.

The solution lies, in part, in the way we have carelessly consumed energy up to now. The potential for efficiency savings and demand reduction provides us with great opportunities for rapid progress. This potential could be realised most effectively in cities as they can be the most environmentally efficient places to live.

The first step in tackling over consumption is for people to find out their ecological footprint and take action to reduce it. Start your journey, do the WWF-UK ecological footprint. And find out our eco tips to help you reduce your eco-debt.

• Measure your footprint
• Read the report Ecological debt day
• Cities' ecological debt days
• Top ten ways to reduce your ecological footprint