If you are not making enough money at you current employer, it can be tough to make serious progress in paying down you debt. (financialexcellence.net)
That is exactly the opposite of what it will take to make serious progress on slowing greenhouse gas emissions. (howiehawkins.org)
But it was only after the cultural revolution ended in 1976 that the nation made serious progress towards establishing a strong presence in space. (scientificamerican.com)