What are pros and cons of moving water to distribute it to areas where it is needed

In 1870, which path would settlers moving west from el paso to los angeles have followed? a) old spanish trail b) gila trail c) california trail d) oregon trail

Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction

¿qué parte de la patagonia está en peligro de exinción por su sobrepesca?