90% of it is evaporative foam shot out of a blower.

其90%含量为可蒸发的泡沫，机中喷出。

The plan took into consideration that the Mediterranean Sea is naturally evaporative, which means that more water evaporates out of the sea then flows into it by rivers and streams.

计划考虑到地中海蒸发的，也就说，更多的水海里蒸发出来，后经由河流和小溪流入地中海。