User Rating: 5 / 5
For the first 4 billion years of Earth’s existence, its continents were dusty, barren and rocky landscapes similar to the surface of Mars. But, around 500 million years ago, this all changed.
User Rating: 5 / 5
The world’s largest solar photovoltaic farms give us an insight into how much acreage is required to produce meaningful amounts of electricity.
User Rating: 5 / 5
Biomass energy includes biogas, liquid biofuels (biodiesel, ethanol, methanol, butanol), and solid biofuels (typically wood, but could be any solid burned to create energy from heat). Solid biofuels can be burned directly to create energy, but both biogas and liquid biofuels must go through a conversion process to become usable fuel.
User Rating: 5 / 5
The growing use of toxic agricultural chemicals including fertilisers is also driving a scaling up of sustainable agrochemical alternatives.
User Rating: 5 / 5
Can a grey wolf calm the climate? Can a whale tame the skies?
User Rating: 5 / 5
About 70 per cent of the species on Earth are insects.
