I can’t open a newspaper or listen to a debate programme these days without hearing that environmental thinking is becoming a global megatrend. To quote one newspaper analytics (translated from danish):
“Because environmantalism is based upon ethical values it has the power to embrace all parts of society and become a truly global megatrend.”

First time I heard the word megatrend mentioned was in A. Giddens Runaway World. Here he was talking about globalism as a megatrend and he also mentions “the third way” in politics as a megatrend.