Burying our rubbish in landfill sites is an unsustainable answer to societies waste problems.
They take up huge areas of land that instead could be used to grow food or house people. And what happens when there is no land left to fill with rubbish?
Luckily, Essex Wildlife Trust have come up with a solution to these 'buried waste holes.' They have turned a 50 year old landfill site into a 120 acre nature reserve, now home to bees, birds and reptiles.
The new park was opened on Saturday May 11th by Sir David Attenborough, president emeritus of The Wildlife Trusts opened the new park. He said: "Well we all know that we produce an appaling amount of waste. Anybody with any kind of conscience must wonder where that's going.
"This shows that you can actually turn those places into wonderful places. We depend upon the natural world, we've got to allow the natural world space to live. This has turned what was a desert into a place where there can be a whole range of wildlife. So it's a marvelous transformation."
Since 2009 the Trust have restored the site, which is one of the largest in western Europe, into a wildlife haven and aim to finish the whole 845 acres by 2016.
The Thurrock Thameside Nature Park at Mucking sits on top of 30 metres of waste from six London boroughs. It is now filled with grasslands, woodland ponds and reedbeds, offering homes to a range of wildlife, including rare species such as the skylark, adders, water voles and the shrill carder bee.
Not only has the park brought nature back to the Thames Estuary but it is also a place of learning for children and a beautiful area for the community. The whole community has come together, with the local children taking part in after school clubs to help convert the site into a wildlife haven.
A visitor centre has also been built on a former landfill site close to the park with breathtaking 360 degree views over south Essex, the estuary and across Kent with a network of cycle routes, bridleways and paths from the centre. The centre is installed with jacks to cope with the settlement of rubbish below its foundations.
See BBC Newsround for more.