Nearly 100 sensors fixed around London since January have revealed the city's air pollution is dangerously high, according to a charity and the city mayor's office. Anna Bevan reports.
02:07
01:08
02:03
01:09
01:21
00:54
01:34
00:33
01:29
00:45
01:24
01:34
01:21
00:54
02:28
00:49
01:03
02:02
00:47
01:37
01:21
00:36
01:52
01:52
00:47
01:44
02:15
02:15
01:29
00:41
01:19
00:55
01:33
02:12
01:50
00:45
02:35
00:31
00:31
01:28
01:09
01:21
01:03
01:50
00:45
00:45
01:49
01:06
01:49
01:04
01:04
01:30
00:55
01:19
01:19
01:29
01:52
01:27
01:15
00:49
02:03
05:00
01:43
01:32
01:24
01:01
01:15
01:08
01:18
01:20
02:28
04:34
01:28
01:55
01:25
01:19
01:42
02:29
04:24
01:23
01:56
01:45
01:25
01:19
01:41
01:00
00:40
01:46
00:55
00:31
01:45
00:58
00:38
00:45
01:06
01:16
01:01
01:17
00:54
00:51
01:56
02:04
02:07
01:48
02:03
01:43
02:01
01:31
01:08
00:54
01:14
01:19
01:33
01:37
01:48
01:38
00:47
03:31
01:08
00:49