WordPress Blank Screen Issue [closed]

add

if ( isset($_GET['debug']) && $_GET['debug'] == 'debug') define('WP_DEBUG', true);

to your wp-config.php file. then visit your site

http://www.cleanupisrael.org.il?debug=debug

you should get an error message instead of just a blank screen.

if that fails, then disable all the plugins and re-enable them one by one. not fun, but should tell you where the problem is.