71.   London is suffocating in air pollution, and its extensive but old subway system is collapsing under years of neglect.

72.   Maybe they would have collapsed under Van Gundy, too.

73.   Many trees collapsed under the heavy snow and rain, and many mountain towns in Idaho lost electricity.

74.   Modern liberalism is collapsing under the weight of its own arrogance.

75.   Moreover, traditional homes tend to be made of old wood, with heavy red-tiled roofs, and the wood collapsed under the weight of the tiles.

76.   More and more gas falls into the center, which grows until it reaches a certain critical mass and collapses under its own enormous weight.

77.   Mezin and Belarus collapsed under the intense pressure in the third period as Scott Young and Bill Guerin scored two goals each.

78.   Ms. Cassouto married again and had another child, but the marriage eventually collapsed under the weight of the lingering memory of her loss.

79.   Most supernovae occur when large stars run out of fuel and then collapse under their own weight.

80.   Naturally, there is pressure mounting around this increasingly hapless team that for the second straight season is collapsing under the weight of playoff expectations.