You don't need a uniform color: We used a mixture of brick red, browns and grays, and then threw in seashells, branches and various types of rock, so our walls ended up looking like cave paintings! ↗
A major one which no one can overlook is technological and based on inventions and discoveries which have altered the whole basis of production and deeply affected social relations. ↗
I tell my environmental friends that they have won. Every issue we look at from an energy perspective is now also looked at from an environmental perspective. ↗