Sorry you need a little more detail for your question.
One of the main sources of conflict between environmental groups and corporations and even political institutions is climate change. There have been politicians who claim that climate change is inexistent, while science provides proof that it is fact. The interests of coal mining and timber corporations are most contrary to the enroironmentalist approach. Also, the palm oil industry has been said to damage the environment, as palm tree plantations are substituting the natural flora in many places. Agricultural bioengineering is equally destructive to the environment, as it reduces the diversity of species through the use of herbicides, and is also wreaking havoc among the bee population.
Answer:
A positive effect of the Columbian exchange was the introduction of New World crops, such as potatoes and corn, to the Old World. A significant negative effect was the enslavement of African populations and the exchange of diseases between the Old and New Worlds
The correct answer to this open question is the following.
The ways that I think the life of a miner would have been difficult are the following.
First, we had to specify that although you did not mention it, we are talking about the time of the westward expansion in California during the Gold Rush.
Once said that I think that the miners in that time lived under very difficult conditions. The place was only land, a wilderness place. No infrastructure, no homes, no services. Miners worked with basic tools such as shovels. Miners worked hard since early in the morning but they really never found any significant gold at all.