Is marijuana as safe as -- or safer than -- alcohol?

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The weed debate reached a new high: President Obama's White House. Is weed really no worse than alcohol as he says?http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=eEzmOhFMMCA:_2fF-YXg8J0:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=eEzmOhFMMCA:_2fF-YXg8J0:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=eEzmOhFMMCA:_2fF-YXg8J0:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=eEzmOhFMMCA:_2fF-YXg8J0:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=eEzmOhFMMCA:_2fF-YXg8J0:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=eEzmOhFMMCA:_2fF-YXg8J0:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=eEzmOhFMMCA:_2fF-YXg8J0:gIN9vFwOqvQ)
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