Debra ...... her rooftop into a garden., Will everyone in the future be using biofuels to ..... their vehicles?, Organic fruit and vegetables contain lots of beneficial ....., We should make more effort to use ...... energy sources, Producing biofuels requires a lot of natural ......., such as water and land., You don't need soil if you grow your plants in a ........ of nutrients and water., Wash fruit and vegetables before you eat them to remove the synthetic ....., ............is a great fertiliser and it's made from food and plant waste., All organic products should display an official organic ........on their packaging., Some scientists are worried that there will be food ......... in the future..

ex 2

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