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.
Nobody MADE opals. They're mined out of the ground.
Environmental issue are subjects problem or controversies that relate to impairement or improvment for the zika.
Most have an environmental officer aboard.
Opals cannot be used as foods. They are hard, precious stones.
economic issue, equality issue and environmental concerns
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
insolation
to much rain