biodegradable |
treated sewage |
to conserve |
eco-friendly |
waste reduction |
to recycle |
ecological |
wastewater treatment plant |
to reduce |
alternative energy source |
dustbin |
disposable |
renewable energy source |
dustbin bag |
energy-saving |
environment |
dustbin liner |
organic |
environment-friendly |
garbage bag |
organic fertilizers |
environmental protection |
garbage can |
ozone-friendly |
environmentalist |
reclamation |
re-use |
green (activist) |
recycling |
recycled |
nature conservation |
wastepaper basket |
solar energy |
unleaded petrol |
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water-energy |
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wind-energy |
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ecology |
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