How long do you take in the shower? Five minutes? Ten? Twenty? Would you take shorter showers if it meant you would be saving the planet? It's true - heating water uses energy. Furthermore, we all need to cut down on our consumption. Quick.

Global warming is currently the biggest threat to mankind, which made it all too shocking to discover that most teenagers aren't even aware of it.

As part of our media coursework, we were asked to produce a print advertisement for a campaign of our choice. I decided on global warming - it's amazing that during the last century the average surface air temperature has risen by 0.5C.

However, I was stunned by the results from the questionnaire I conducted. The majority of teens believe that global warming is a myth or won't be effecting the planet for "ages".

There needs to be more done to raise awareness and inform us teens. After all, we are the future. If we all tried to do a little bit, it would make a difference.

Scientists have said that we will be able to notice substantial damage by the year 2030.

Moreover, I am taken aback that today's youth aren't taking this issue seriously. Sea levels are rising rapidly and parts of the Earth are disappearing forever.

Polar bears are drowning as their homes gradually fade away. It's time we all make an effort. If we walked to school or took public transport instead of travelling by car, it would make a difference.

Until a while ago, I used to leave my laptop on standby when I wasn't using it. But now I switch it off. This saves energy - which would've just gone to waste.

If we all work hard enough we can make this planet a safe place for out great-great grandchildren. Instead of destroying it.

So next time your in the shower, try to get out as quick as possible. The future is in your hands.

Gurpreet Dhaliwal, aged 15, from Blackheath