"Policy goals" won't be enough to protect bicyclists once the cars start driving themselves. Strong standards will be necessary to govern the interactions between cars and bikes in an autonomous future.
For those concerned about world population, a new study from Spain rebuts prior studies, including the U.N. 2011 report that project population reaching 10 billion by 2100. The new report projects it peaking at 8 billion in 2050, then declining.
To mark "World Population Day", Grist published this commentary by environmental writer Fred Pearce who asks environmentalists not to fall in the Malthusian trap of blaming population, not consumption.