Redwoods, like all trees, are engineered marvels that thrive in a narrow strip of land in the US's Pacific Northwest.
Struggling honeybee colonies could become bio-hybrid entities with biological and technological components.
Light pollution is growing in North America by up to 10% a year according to a nightly measurement.
Some countries focus on end-of-life measures like disposal and recycling while others prioritize reducing production.
One billion children are exposed to air pollution, 815 million to lead pollution and 820 million to heat waves.
Given finite research and practical resources, how should we act to conserve biological diversity?