Not really. They are soft stones, even for jewelry, but the mining of them may be causing problems.
It is not an environmental issue, it is a public health issue
But it is water that is a major environmental issue.
Garbage is the disposal of unwanted or undesired material or substance. It is an environmental issue.
Environmental issue are subjects problem or controversies that relate to impairement or improvment for the zika.
Nobody MADE opals. They're mined out of the ground.
Most have an environmental officer aboard.
economic issue, equality issue and environmental concerns
Opals cannot be used as foods. They are hard, precious stones.
food security is an environmental issue arising from major environmental changes hence requires an integrated food system approach, not just a focus on agricultural practices.
Industrial pollution
to much rain
insolation