In recent years, concern over the vulnerability of the native species has led to court cases that have forced the Hawaii Department of Land and Natural Resources to eradicate all feral species on the mountain.
In those same years, concern over climate change was also beginning to gather momentum, threatening the future of Big Oil and generating pressures to invest in alternative forms of energy.
Over the years, concerns about the country's safety have thwarted several planned takeovers, including a Chinese oil company's bid for the oil company Unocal and a Dubai port operator's effort to buy several American assets.
Over the years concerns about their safety have been raised, but how much evidence is there that they're bad for us?
The second problem, which remains much debated over many years, concerns how and where the pore-forming protein perforin, used by CTL and NK cells to destroy their targets, does or does not cross membranes.
The regulatory focus on school nutrition has been gaining ground nationwide in recent years, amid concerns over childhood obesity and a lack of access to healthful food.
In recent years, increasing concerns over environment, energy and climate have renewed interest in biotechnological production of butanol.
In recent years, amid concerns over hydro-electric projects, international financial entities, such as the International Finance Corporation (IFC), have started to focus on promoting the idea of sustainable hydropower.
For example, one commercial fishing operation commenced on the Murray River near Echuca in 1855, targeting Murray cod over hundreds of kilometres of river, and yet within eight years, grave concerns over the sustainability of this operation, and complaints about the near-absence of Murray cod in their heavily fished grounds, were being raised in the main state newspaper, The Argus.
For over 20 years, concern has been raised over the overuse of psychotropic medication, particularly antipsychotics and benzodiazepines ('sedatives') in nursing homes.
