The map shows 'moving to work and escape poverty': Migration between and inside world regions from 1995 to 2004. Colors show regional migratory balance (surplus or deficit), arrows show major movements between and inside regions.
The graph shows 'travelling for leisure': trends in number of tourists since 1950 and projections to 2020.
– to verify whether it isn't poisoning the air in your home or consuming too much energy. Have it replaced once every 15 years – to benefit from the technological advances that render new boilers more energy-efficient.
More green tips