The TV presenter is pregnant with her first child with her husband Nick Lachey and she is determined to live a green life for the tot. Vanessa feels very strongly about environmental issues and wants future generations to inherit a world they can be proud of. She said: "I definitely want to safeguard the future for my baby. I want to be health conscious for the baby. I`m learning about BPA friendly bottles. A couple have been sent to me and it`s great to understand that when plastics are heated, all the toxins [come out]." "And even food. Things that are pumped with hormones. You actually, physically see the changes in a 13-year-old girl that was eating hormone food and a 13-year-old girl that was eating organic." The 31-year-old beauty insists one small change everybody could make is to wash their clothes in cold water instead of hot. Vanessa - who married Nick, 38, in July 2011 on Sir Richard Branson`s private Necker Island in the British Virgin Islands - says if everybody altered their laundry habits it would save enough energy to light up New York for "71 years". Speaking to promote P&G`s new Tide Coldwater detergent, she told E! Online: "We use 80 per cent of our household energy to heat water. By saving energy, you`re saving money, who doesn`t want that? And lastly, you`re doing something good for the environment, so it`s a one, two, three punch. "If everybody in the US just did laundry with cold water for one year, it could power the city of New York`s lights for 71 years. It`s crazy."