How much more is so-called green energy adding to my energy bill?
Leo Hickman: Does living in an urban centre have a smaller environmental impact than living in a rural area?
Leo Hickman: Can electric cars claim to be 'emissions-free' when they run on electricity generated from the burning of fossil fuels?
Leo Hickman: Is carbon offsetting little more than a clever con? Or can it actually help to ameliorate the environmental impact of your carbon-intensive lifestyle choices?
Party leaders will be racking up a fair few air miles in the run up to the big day on 6 May
Every time you go online you increase your carbon footprint. Is it possible to be a green surfer?
Leo Hickman: As the country reaches for the heating controls, have our carbon emissions increased even if fewer of us are driving?
Leo Hickman: Should world leaders be expected to negotiate a climate change deal via video conference? Or is flying justifiable?
Is there any difference in emissions between second and first class mail? And what about express delivery companies?
Leo Hickman: Is the world's greenest laptop made by a household name such as HP, Dell and Apple – or a small cottage manufacturer?
Just how green is the white stuff?
Letting your mouse do the walking sounds eco-friendly, but there are hidden costs to e-retail, warns Lucy Siegle
An increasing amount of the food I buy now seems to be packaged in Tetrapak cartons rather than tin cans
I live in a 110-year-old, stone-built house, which is constantly damp. What would Leo Hickman suggest?
Leo Hickman: Locally emissions will fall but not nationally
Leo Hickman: What is the Iraq war's carbon footprint?
Offsetting carbon emissions sounds like a good antidote to modern life, says Lucy Siegle, but it's not as easy as it seems.
The subcontinent's boom has raised environmental alarms. But it could prove a wake-up call for the west, says Lucy Siegle.